CVE-2025-27846

Physical privilege escalation via unprotected boot settings

Published Aug 14, 2025 · Updated Aug 15, 2025

Privilege escalation in ESPEC North America Web Controller 3 before 3.3.8 allows physically proximate attackers to alter boot settings. Unset GRUB and BIOS passwords permit changes to bootloader configuration, kernel boot parameters, and firmware through USB media. Physical device access is required, and the attacker can mount and alter firmware partitions by booting external media.

CVSS severity4.3
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Privilege escalation in ESPEC North America Web Controller 3 before 3.3.8 allows physically proximate attackers to alter boot settings. Unset GRUB and BIOS passwords permit changes to bootloader configuration, kernel boot parameters, and firmware through USB media. Physical device access is required, and the attacker can mount and alter firmware partitions by booting external media.

The record

CVE
CVE-2025-27846
Published
Aug 14, 2025
Updated
Aug 15, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-269, T1548
Attack vector
physical
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 14, 2025CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorphysical
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

4.3CISA-ADPCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorphysical
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-269Improper Privilege Management
T1548Abuse Elevation Control Mechanism

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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